Clean up legacy documentation and scripts

- Remove all references to workflow execution/management features
- Delete legacy scripts for bidirectional n8n integration
- Update documentation to focus on node documentation serving only
- Remove old docker-compose files for workflow management
- Add simplified docker-compose.yml for documentation server
- Update CHANGELOG.md to reflect v2.0.0 and v2.1.0 changes
- Update Dockerfile to use v2 paths and database

The project is now clearly focused on serving n8n node documentation
to AI assistants, with no workflow execution capabilities.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -64,4 +64,8 @@ docker-compose.override.yml
 .lock-wscript
 .node_repl_history
 .npmrc
-.yarnrctemp/
+.yarnrc
+
+# Temporary files
+temp/
+tmp/